Yup pretty much. It's... complicated if you really dive into it. I'm saying this as a trans person - there are biological differences between people. In literally everyone, though - it's not just a sex thing. No two males, females, intersex, or otherwise are alike biologically. Everyone's biological stats are different. Even twins are different.

These categories exist in science to easily communicate basic ideas based on medical observations. But once you get to the nitty-gritty of a person's personal medical history it's really hard to categorize certain things. You can have "true" females with more male hormones than "true" males and vice-versa. You can be born without any sex organs and still develop into an adult.

Bodies are weird. Medical science is very complicated and interesting. We really don't know what we're doing still or how a lot of our biology operates. Can you attribute someone's sports prowess to their hormones? Maybe? I don't know. I don't think it matters in the grand scheme of things. I think someone's determination to do something is a bigger indicator of how well they'll do in the end.

Nothing's certain in science. Disproving something is easy. Proving things is a lot harder lol.